import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'


Vue.use(Router)

const router = new Router({
  routes: [
    {path:'/' , redirect:'/login' },
    {path:'/login',component:Login},
    {path:'/home',component:Home}
  ]
})
//挂在路由导航守卫
router.beforeEach((to,from,next) =>{
  //to代表将要访问的路径
  //from代表从哪个路径来
  // next是一个函数代表放行
  // next() 放行 next('/login')强制跳转
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next ('/login')
  next()
})

export default router
